[FIX] Trade filter on history page

Trade filter shows only partially/fully funded trades. I would call this a feature, but it's classified as a bug in Jira, hence the [FIX] label.

[Jira RT-1835](https://ripplelabs.atlassian.net/browse/RT-1835)
[Bountysource](https://www.bountysource.com/issues/2842682-create-trade-filter-in-history-tab)

Modified since last pull request. "orders" filter is now identical to earlier "offers" filter.
Adding logging as shown here:
```javascript
if (effect.type === 'offer_cancelled') {
  isCancellation = true;
  if (event.transaction && event.transaction.type === 'offercancel')
    return;
} else {
  console.log("effect.type === 'offer_cancelled' evaluated to false for effect.type = " + effect.type);
} 
```
Gives me multiple entries like this in the browser javascript debugger
```
effect.type === 'offer_cancelled' evaluated to false for effect.type = offer_bought
```
I guess the switch statement could be refactored to make things more clear, but I tried to stick close to the original logic/style to avoid breaking existing functionality.

Let me know what you want me to do about this.